Fuel-feeding device



Nov. 2 ,1926.

FUEL FEEDING DEVI CE Filed Jan. 16;

ing these difficulties.

Aso

Patented Nev. 2,1926.

l'UNITED STATES BATENT OFFICE.

WILLIAM C. I'IECKEROTH, OF ERIE, PENNSYLNTA'NIA, ASSIGNOR `'.IO ERIECITY IRON WORKS, OF ERIE, PENNSYLVANIA, A. CORPORATION OF PENNSYLVANIA.

' FUEL-'Firewire DEVICE.

applicati@ mea Janumy 16, 1922. serial No. 529,521.

In burning pulverized fuel Where the fuel is carried in with the majorportion or all the air for combustion there .has been diliticulty indistributing the heat of the furnace 5 so as to prevent injury to theWalls and to deliver the most intense head at the desired part of thefurnace andalso in carrying the 'combustion to as near completion asdesired. The present invention 1s directed to obviat- The invention isillustrated in the accompanying drawings as follovvsr Fig. 1 shows acentral section of the furnace with the boiler in place thereon.

Fig. 2 a side elevation, partly in section, of a pulverizer.

Fig. 3 a section of one of the discharge' pipes.

1 marks the boiler, 2 the furnace, 3 the bridge Wall, 4 the rearchamber, 5 the front chamber, the boiler ues from the boiler carryingthe products of combustionfrom v the chamber 4 to the chamber fanddischarge stack 6. Fuel with the air for com- 25 bustion is deliveredthrough a horizontal discharge nozzle 7 leading from a branch pipe 8.This pipe extends into the furnace horizontally. The discharge nozzle 9leads from a branch pipe l0 and discharges at an angle tothe nozzle 7intercepting the'fuel discharged from the nozzle 7 so as to fan out theincoming fuel with a preponderance of movement upwardly into contactwith the boiler;

Supplemental air ma be delivered throughl the openings 11 i desired.-Spiral deflectors 12 are arranged inthe nozzles 7 and 9 and give to theincomingmlxture of air and fuel avspiral movement'at thel point ofdischarge. vThe branch pipes 8 and 10 lead from the main pipe 13. Themain pipe 13 leads from the pulverizer 14.' .Any desired type ofpulverizer may I.loe used. Asshovvn the pulverizer has the linletopening 15 leading to the` breakerpch'amber 16. The breaker bars 17mountedV on the shaft 18 are rotated in the chamber 16 and the materialbroken asses from the chamber linto'the path of an blades 19 carryingthe material to a restricted annular beater space 20 formed by rotatingthe cylinder 21 With the beaters 21a mounted thereonv and operating onan attrition surface 22. The material is discharged through the passage23 yto a 10W pressure fan 24 ,delivering coal and air through thedischarge .25 to the main p1pe 13.

What I claim as new is In a fuel feeding device, the combination of'afurnace; and means' for feeding pulverized fuel and the major portion ofair for combustion together to the furnace cornprisng a single mainconduit discharging through two delivery pipes, one delivering upwardlyand the other horizontally, the discharge from these pipes intersecting,the velocity of the columns of discharged fuel and air beingapproximately equal at the point of intersection and fanning out aresultantvmovement of fuel and 'air through;

` WILLnnu e. HEGKEROTH.

